<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>画盒子实验</title>
    <link rel="stylesheet" href="./css/printbox.css"></link>
</head>
<body>
    <div class="header">
        <h1 class="white">泥嚎 我试一试这个头</h1>
    </div>
    <div class="nav center">
        <h1 class = "white">泥嚎 我试一试这个导航</h1>
    </div>
    <div class="main center">
        <h1 class = "white">泥嚎 我试一试这个主页面</h1>
        <h1 class = "white">泥嚎 我试一试这个主页面</h1>
        <h1 class = "white">泥嚎 我试一试这个主页面</h1>
    </div>
    <div class="footer">
        <h1 class = "white">泥嚎 我试一试这个页脚</h1>
    </div>
</body>
</html>